Has anyone had any experience with one of these.

https://www.amazon.com/Trailer-Valet...ct_top?ie=UTF8

Trailer Valet TVXL25 Jack/Leveler & Chock

My situation is, I'm looking at parking boat in 3rd stall of garage. Its gonna require some carefull maneuvering since the 3rd stall is recessed 2 ft and its not a straight drive in. I'm gonna have to come in at an angle and carefully maneuver through a 9 ft wide door. So, looking at solutions to make this easier. I could prolly drive it all the way in but not without risk. I'm thinking driving it up until the transom and rear tires enter garage and then use a powered dolly to push boat the rest of the way. The driveway is a mild incline of maybe 7-8 degrees.
Anyone have any experience with these?. I keep reading amazon reviews and they're all over the place, high positives and strong negative reviews. Not sure who to believe.